A binder of highly classified intelligence about Russia’s interference in the 2016 presidential election, last seen with former President Donald Trump, has gone missing, and no one seems to know where it is — coinciding with a moment when the former president is being prosecuted for retaining national defense information at his Mar-a-Lago country club. All this smells rotten, argued former prosecutor Kristy Greenberg on MSNBC’s “The Beat” Friday evening — and it could lead to criminal charges. “So Kristy, [former FBI official] Frank [Figliuzzi] has talked a bit about accountability, like refor…